package com.changgou.page.service.impl;

import com.alibaba.fastjson.JSON;
import com.changgou.entity.Result;
import com.changgou.goods.feign.CategoryFeign;
import com.changgou.goods.feign.SkuFeign;
import com.changgou.goods.feign.SpuFeign;
import com.changgou.goods.pojo.Category;
import com.changgou.goods.pojo.Sku;
import com.changgou.goods.pojo.Spu;
import com.changgou.page.service.PageService;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import java.io.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class PageServiceImpl implements PageService {
    @Value("${pagepath}")
    private String pagepath;

    @Autowired
    private TemplateEngine templateEngine;

    @Override
    public void generateHtml(String spuId) {
        //1.获取context对象,用于存储商品的相关数据
        Context context = new Context();
        //1.1定义私有方法获取静态化页面相关数据
        Map<String, Object> itemData = this.getItemData(spuId);
        context.setVariables(itemData);
        //2.获取商品详情页面的存储位置
        File dir = new File(pagepath);
        //3.判断当前存储位置的文件夹是否存在,如果不存在,则新建
        if (!dir.exists()) {
            dir.mkdirs();
        }
        //4.定义输出流,完成文件的生成
        File file = new File(dir + "/" + spuId + ".html");
        Writer out = null;
        try {
            out = new PrintWriter(file);
            //一,生成静态化页面
            /**
             * String template:模板名称
             * IContext context:数据
             * Writer writer:输出流
             */
            templateEngine.process("item", context, out);
        } catch (Exception e) {
            //打日志Logger.error
            e.printStackTrace();
        }finally {
            //5.关闭流
            try {
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    @Autowired
    private SpuFeign spuFeign;
    @Autowired
    private CategoryFeign categoryFeign;
    @Autowired
    private SkuFeign skuFeign;

    /**
     * 获取静态化页面的相关数据
     *
     * @param spuId
     * @return
     */
    private Map<String, Object> getItemData(String spuId) {
        Map<String, Object> resultMap = new HashMap<>();
        //1.获取spu
        Spu spu = spuFeign.findSpuById(spuId).getData();
        resultMap.put("spu", spu);
        //2.获取图片信息
        if (spu != null) {
            if (StringUtils.isNotEmpty(spu.getImages())) {
                resultMap.put("imageList", spu.getImages().split(","));
            }
        }
        //3.获取商品分类信息
        Category category1 = categoryFeign.findById(spu.getCategory1Id()).getData();
        resultMap.put("category1", category1);
        Category category2 = categoryFeign.findById(spu.getCategory2Id()).getData();
        resultMap.put("category2", category2);
        Category category3 = categoryFeign.findById(spu.getCategory3Id()).getData();
        resultMap.put("category3", category3);
        //4.获取sku的相关信息
        List<Sku> skuList = skuFeign.findSkuListBySpuId(spuId);
        resultMap.put("skuList", skuList);
        //5获取商品规格信息,将规格信息转为Map格式
        String specItems = spu.getSpecItems();
        resultMap.put("specificationList", JSON.parseObject(specItems,Map.class));
        return resultMap;
    }
}
